Infrared and Raman spectroscopic studies of glasses with NASICON-type chemistry

被引：0
|
作者：
K. J. Rao
K. C. Sobha
Sundeep Kumar
机构：
[1] Indian Institute of Science,Solid State and Structural Chemistry Unit
来源：
Journal of Chemical Sciences | 2001年 / 113卷 / 5-6期
关键词：
NASICON glasses; dynamical bond-switching mechanism; dispropor-tionation reactions;
D O I：
10.1007/BF02708786
中图分类号：
学科分类号：
摘要：
Structures of NASICON glasses of the general formula AB2(PO4)3, where A = Li, Na or K and B = Fe, Ga, Ti, V or Nb, have been investigated using vibrational (IR and Raman) spectroscopies. Phosphate species appear to establish an equilibrium via a disproportionation reaction involving a dynamical bond-switching mechanism where both charge and bonds are conserved. B ions in the system acquire different coordinations to oxygens. Alkali ions cause absorptions due to cage vibrations. All the observed spectroscopic features are consistent with speciation involving disproportionation reactions.
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页码：497 / 514
页数：17
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